Abstract: Carbon fiber reinforced polyetheretherkatone composites (CF/PEEK) had low density, high toughness, high fatigue strength, and could be recycled. However, the melting temperature of PEEK was extremely high(>340 ℃), so as the melting viscosity(>1000 Pa·s). Meanwhile, the melting-ablation process temperature window of PEEK was narrow, the consolidation of CF/PEEK parts was difficult. This paper proposed a new heating method of CF/PEEK composites, as the combination of self-resistance electric heating and in-situ membrane heating method. The authors introduced the in-situ membrane heating to compensate the heat dissipation, achieve the uniformly temperature field distribution. Finite element simulation and experimental results verify the effectiveness of the proposed method Compared with the pure self-resistance electric heating method, the temperature uniformity of the parts is increased by 75%, the crystallinity is increased by 16.2%. The high efficiency, uniformly heating of CF/PEEK composites are achieved.

Key words: thermoplastic composite, polyetheretherketone, self-resistance electric heating, finite element simulation, temperature field distribution

摘要： 碳纤维增强聚醚醚酮树脂基(CF/PEEK)复合材料密度小、韧性强、疲劳强度高，且可循环使用，但PEEK树脂熔融温度高(>340 ℃)、熔融黏度大(>1000 Pa·s)、熔融烧蚀工艺温度窗口小，零件固化难度大。提出一种CF/PEEK树脂基复合材料自阻电热原位膜混合加热固化方法，结合有限元仿真，引入组合原位膜自适应地辅助加热制件。有限元仿真和实验研究结果证明了该方法的有效性：加热过程中相较纯自阻电热加热方法，制件温度均匀性提高了75%，结晶度提高了16.2%，实现了CF/PEEK树脂基复合材料的高效、均匀加热固化。

关键词: 热塑性复合材料, 聚醚醚酮, 自阻电热, 有限元仿真, 温度场分布